为低温循环水产养殖系统开发一个化细菌群落
Jiro Arima1,2, Takumi Matsumoto3, Haruki Nagamura3
1Department of Agricultural, Life and Environmental Sciences, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8553, Japan. arima@tottori-u.ac.jp.
World journal of microbiology & biotechnology
|April 2, 2025
概括
这项研究开发了一种用于低温循环水产养殖的细菌群体,有效化氨和酸盐. 该系统有效地去除废物并支持冷水鱼类的生长,植物集成减轻了酸盐的积累.
科学领域:
- 水生微生物学 水生微生物学
- 环境生物技术 环境生物技术
- 水产养殖系统 水产养殖系统
背景情况:
- 再循环水产养殖系统 (RAS) 需要高效的循环来管理水质.
- 低温给RAS中的微生物化过程带来了挑战.
- 可持续的水产养殖实践对于最小化环境影响至关重要.
研究的目的:
- 开发和描述用于低温RAS的氨和酸盐氧化细菌群体.
- 建立一个功能性化系统,能够在15°C高效处理氨.
- 评估该系统在支持冷水鱼类养殖和废物管理方面的有效性.
主要方法:
- 使用批量培养和无机介质培养不同的氨和酸盐氧化细菌群体.
- 开发一个封闭的循环培养系统,对氨氧化细菌进行丰富.
- 安普利康测序用于识别参与化过程中的关键细菌群 (Nitrosomonadaceae,Nitrospirales).
- 细菌群落的引入用于养鱼的水箱 (Oryzias latipes var. 在15°C的温度下使用.
- 监测氨,酸盐和酸盐水平,并集成Epipremnum aureum (Pothos) 来管理酸盐的积累.
主要成果:
- 一个细菌群体成功地在15°C的温度下在1天内有效化1毫米氨.
- 鉴定出Nitrosomonadaceae和Nitrospirales是主要负责氨和酸盐氧化的细菌群.
- 该系统证明,在养殖冷水鱼类时,可以有效地去除氨和酸盐.
- 观察到酸盐的积累,但通过添加Epipremnum aureum有效地减轻了这种情况.
结论:
- 建立了一个强大的化系统,用于低温封闭循环水产养殖.
- 开发的细菌群落和系统设计为冷水鱼养殖提供了可持续的解决方案.
- 结合水生植物可以通过解决酸盐的积累,进一步提高RAS的水质管理.
相关概念视频
Hyperthermophilic Bacteria
Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their genes show strong...
Microbial Mats
Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
Microbes and the Nitrogen Cycle
The nitrogen cycle is a complex biogeochemical process critical to maintaining the balance of nitrogenous compounds in ecosystems. This cycle involves multiple microbial-mediated transformations through which nitrogen changes oxidation states, supporting essential ecological functions and contributing to plant and microbial growth.Nitrogen Fixation and AmmonificationNitrogen fixation initiates the cycle by converting inert atmospheric nitrogen (N₂) into bioavailable ammonia (NH₃), a process...
Freshwater Microbial Ecology
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...
Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
Bioreactor Design and Operational System
Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...


